<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        #asd {
            color: gold;
        }
        .div1::before{
            content: "222";
            width: 100px;
            height: 1px;
            background-color: gold;
        }
        .asdasd{
            color: red;
        }
        .div1{
            padding: 100px;
            
            width: 100px;
            height: 100px;
            border: black solid 1px;
        }
        .div1 div{
            margin-top: 100px;

        }
        .div2{
            width: 100px;
            height: 100px;
            border: black solid 1px;
            margin-bottom: 100px;
        }
        .div3{
            position:relative;
            margin-top: 100px;
            width: 100px;
            height: 100px;
            border: black solid 1px;
        }
    </style>
</head>
<body>
    <!--  -->
    <div>11</div>

    <h1>hahah</h1>
    <h1 id="asd">hahah</h1>
    <h1 id="asd">hahah</h1>
    <h1 id="asd">hahah</h1>
    <h1 id="asd">hahah</h1>
    <p class="asdasd">asd <span>asdasd</span></p>

    <div class="div1">
        <div></div>
        <div></div>
    </div>

    <div class="outer"></div>


    <div class="div2"></div>
    <div class="div3"></div>
    </body>
</html>